Let me clear this up. Your eyes have no reaction to the acid GAS coming from the cut onion. When you smell onions your brain makes your eyes cry. Your eyes dont burn at all. If your eyes burnt when ever you cut onions you would have quite the flaming eyes.

Onions release Sulfur Trioxide in the onion juice, which readily evaporates. When this hits the water in your eyes, it reacts (SO3 + H2O = H2SO4) to form sulphuric acid. Which burns. And makes you cry, which adds water to make more acid, which burns and makes you cry some more.
Keeping the onion cold = less evaporation = less tears. Other ideas involve wearing sunglasses to keep it out of your eyes. I hadn’t heard of the open flame before. Wonder what that does.

umm….if comes out “on th cob,” I’d be worried…’cause that would mean that you the entire “corn on the cob” and not just the “corn kernels” (which is the only real edible part of corn anyway)…either that, or you swallowed the whole thing entirely.